lots of comments re guage brightness,

[Woodie]

Well in doing some searches here is what I found. I have not done this yet and believe this is for MGB but why not for our guages..

https://www.britishcarforum.com/bcforum/ubbthreads.php/topics/514840/1

good luck

 

[Sarastro]

Should work for our stuff. There's no real difference.

 

[JPSmit]

I thought of that and decided to stick with the existing bulbs, partly because I like the quality of the light of incandescent bulbs in an old car. I did however replace all the bulbs, bypass the rheostat (which I suspect is the biggest current draw - and when will I need to dim the lights in an MG ) And I put an inline fuse on the circuit just to keep the smoke in.